Function zero_appender

test/functional/feature_taproot.py:642–644

Return a callable that evaluates expr and returns it with a zero added.

(expr)

    return fn

def zero_appender(expr):
    """Return a callable that evaluates expr and returns it with a zero added."""
    return lambda ctx: deep_eval(ctx, expr) + b"\x00"

def byte_popper(expr):
    """Return a callable that evaluates expr and returns it with its last byte removed."""